finish asar patch - relative addressing fixes

[binary1230]

I hit a bug in asar where Diz was generating the right code, but asar was doing the wrong thing (it has to do with relative addressing)

I wrote a PR to fix it over there and the maintainers said they would probably be ok merging as-is. I wanted to perform a few more tests to make sure I don't break anything in asar. https://github.com/RPGHacker/asar/pull/171/files

Once that's merged in, that's the only open asar bug that was causing me issues in the 4MB ROM project I'm working with.